package com.atguigu.educenter.controller;

import com.atguigu.commonutils.JwtUtils;
import com.atguigu.educenter.entity.UcenterMember;
import com.atguigu.educenter.service.UcenterMemberService;
import com.atguigu.educenter.utils.ConstantWxUtils;
import com.atguigu.educenter.utils.HttpClientUtils;
import com.atguigu.exceptionhandler.GuliException;
import com.google.gson.Gson;
import com.sun.deploy.net.URLEncoder;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;

import java.util.HashMap;


@Controller
@RequestMapping("/api/ucenter/wx")
public class WxApiController {

    @Autowired
    private UcenterMemberService memberService;

    //1、生成微信扫描二维码
    @GetMapping("/login")
    public String getWxCode(){
        //固定地址，后面拼接参数
//        String url = "https://open.weixin.qq.com/connect/qrconnect?" +
//                "appid="+ ConstantWxUtils.WX_OPEN_APP_ID +
//                "&response_type=code";
        //微信开放平台授权baseUrl，%s相当于？代表占位符
        String baseUrl = "https://open.weixin.qq.com/connect/qrconnect" +
                "?appid=%s" +
                "&redirect_uri=%s" +
                "&response_type=code" +
                "&scope=snsapi_login" +
                "&state=%s" +
                "#wechat_redirect";

        //对redirect_url进行URLEncoder编码
        String redirectUrl = ConstantWxUtils.WX_OPEN_REDIRECT_URL;
        try{
            redirectUrl = URLEncoder.encode(redirectUrl, "UTF-8");
        }catch(Exception e){
            e.printStackTrace();
        }

        //设置%s里面的值
        String url = String.format(baseUrl,
                ConstantWxUtils.WX_OPEN_APP_ID,
                redirectUrl,
                "atguigu");

        //重定向到请求微信地址里
        return "redirect:" + url;
    }

    //2、获取扫描人信息，添加数据
    @GetMapping("/callback")
    public String callback(String code, String state){

        //1、获取code值，临时票据，类似于验证码

        //2、拿着code请求微信固定的地址，得到两个值 access_token 和 openid
        String baseAccessTokenUrl = "https://api.weixin.qq.com/sns/oauth2/access_token" +
                        "?appid=%s" +
                        "&secret=%s" +
                        "&code=%s" +
                        "&grant_type=authorization_code";
        //拼接三个参数 id 秘钥 和 code值
        String accessTokenUrl = String.format(baseAccessTokenUrl,
                ConstantWxUtils.WX_OPEN_APP_ID,
                ConstantWxUtils.WX_OPEN_APP_SECRET,
                code);

        String accessTokenInfo = null;
        try {
            accessTokenInfo = HttpClientUtils.get(accessTokenUrl);
            System.out.println("accessToken=============" + accessTokenInfo);
        } catch (Exception e) {
            throw new GuliException(20001, "获取access_token失败");
        }

        //从accessTokenInfo中获取值access_token
        //把accessTokenInfo字符串转换map集合，根据map里面key获取内容
        Gson gson = new Gson();
        HashMap mapAccessToken = gson.fromJson(accessTokenInfo, HashMap.class);
        String accessToken = (String) mapAccessToken.get("access_token");
        String openid = (String) mapAccessToken.get("openid");

        //把扫码人信息添加到数据库
        //判断数据库表是否有相同的微信信息,根据openid判断
        UcenterMember member = memberService.getOpenId(openid);
        if(member == null){ //为空表示没有数据，进行查询详细信息，再添加数据库

            //3、拿着得到的access_token 和 openid,再去请求微信提供固定的地址，获取扫描人的信息
            //访问微信的资源服务器，获取用户信息
            String baseUserInfoUrl = "https://api.weixin.qq.com/sns/userinfo" +
                    "?access_token=%s" +
                    "&openid=%s";
            String userInfoUrl = String.format(baseUserInfoUrl, accessToken, openid);
            //发送请求
            String userInfo = null;
            try {
                //{"openid":"o3_SC553Aap_kQHhy4VhxiJtkNDQ","nickname":"Boy","sex":1,"language":"zh_CN","city":"Datong","province":"Shanxi","country":"CN",
                // "headimgurl":"https:\/\/thirdwx.qlogo.cn\/mmopen\/vi_32\/jDib7YJO6TRousxxKNzicr4VMCAfibCu7KkPvjRlDlI5N2lj4tmicSqQRcZvQKD0QxgNmolPHhFk9gowdsh6AcxWQg\/132",
                // "privilege":[],"unionid":"oWgGz1KAqgwmfvTFoQUU4Cu4NgHY"}
                userInfo = HttpClientUtils.get(userInfoUrl);
                System.out.println("resultUserInfo==========" + userInfo);
            } catch (Exception e) {
                throw new GuliException(20001, "获取用户信息失败");
            }
            //获取userInfo字符串扫描人信息
            HashMap userInfoMap = gson.fromJson(userInfo, HashMap.class);
            String nickname = (String) userInfoMap.get("nickname");
            String headimgurl = (String) userInfoMap.get("headimgurl");

            //进行添加数据库
            member = new UcenterMember();
            member.setOpenid(openid);
            member.setNickname(nickname);
            member.setAvatar(headimgurl);
            memberService.save(member);
        }

        //使用jwt根据member对象生成一个token字符串
        String jwtToken = JwtUtils.getJwtToken(member.getId(), member.getNickname());

        //最后返回首页， 通过路径传递token字符串
        return "redirect:http://localhost:3000?token=" + jwtToken;
    }

}
